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Ron,
I didn't dyno before the s/c. I think we all know what kind of power the GS400 makes in stock trim. I believe Thomas as all the dyno sheet. He posted them here somewhere.
JPI
214-221-3135 and ask for Jason. I would be happy to answer all the questions, pricing. No more kit for the GS400 but I can do a one off s/c. Thank you.
JPI